<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="utf-8">
    <title>Document</title>
    <link rel="stylesheet" href="./assets/css/main.css">
    <link rel="stylesheet" href="./assets/css/index.css">
</head>
<body>
    <div class="box">
        <div class="btn">显示</div>
        <ul>
            <li>01</li>
            <li>02</li>
            <li>03</li>
            <li>04</li>
            <li>05</li>
        </ul>
    </div>
</body>
</html>